352 lines
8.1 KiB
C
352 lines
8.1 KiB
C
/*
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* Helper functions for the PM3386s on the Radisys ENP2611
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* Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
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* Dedicated to Marija Kulikova.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <asm/io.h>
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#include "pm3386.h"
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/*
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* Read from register 'reg' of PM3386 device 'pm'.
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*/
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static u16 pm3386_reg_read(int pm, int reg)
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{
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void *_reg;
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u16 value;
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_reg = (void *)ENP2611_PM3386_0_VIRT_BASE;
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if (pm == 1)
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_reg = (void *)ENP2611_PM3386_1_VIRT_BASE;
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value = *((volatile u16 *)(_reg + (reg << 1)));
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// printk(KERN_INFO "pm3386_reg_read(%d, %.3x) = %.8x\n", pm, reg, value);
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return value;
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}
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/*
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* Write to register 'reg' of PM3386 device 'pm', and perform
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* a readback from the identification register.
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*/
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static void pm3386_reg_write(int pm, int reg, u16 value)
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{
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void *_reg;
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u16 dummy;
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// printk(KERN_INFO "pm3386_reg_write(%d, %.3x, %.8x)\n", pm, reg, value);
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_reg = (void *)ENP2611_PM3386_0_VIRT_BASE;
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if (pm == 1)
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_reg = (void *)ENP2611_PM3386_1_VIRT_BASE;
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*((volatile u16 *)(_reg + (reg << 1))) = value;
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dummy = *((volatile u16 *)_reg);
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__asm__ __volatile__("mov %0, %0" : "+r" (dummy));
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}
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/*
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* Read from port 'port' register 'reg', where the registers
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* for the different ports are 'spacing' registers apart.
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*/
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static u16 pm3386_port_reg_read(int port, int _reg, int spacing)
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{
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int reg;
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reg = _reg;
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if (port & 1)
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reg += spacing;
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return pm3386_reg_read(port >> 1, reg);
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}
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/*
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* Write to port 'port' register 'reg', where the registers
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* for the different ports are 'spacing' registers apart.
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*/
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static void pm3386_port_reg_write(int port, int _reg, int spacing, u16 value)
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{
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int reg;
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reg = _reg;
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if (port & 1)
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reg += spacing;
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pm3386_reg_write(port >> 1, reg, value);
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}
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int pm3386_secondary_present(void)
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{
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return pm3386_reg_read(1, 0) == 0x3386;
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}
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void pm3386_reset(void)
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{
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u8 mac[3][6];
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int secondary;
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secondary = pm3386_secondary_present();
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/* Save programmed MAC addresses. */
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pm3386_get_mac(0, mac[0]);
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pm3386_get_mac(1, mac[1]);
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if (secondary)
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pm3386_get_mac(2, mac[2]);
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/* Assert analog and digital reset. */
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pm3386_reg_write(0, 0x002, 0x0060);
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if (secondary)
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pm3386_reg_write(1, 0x002, 0x0060);
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mdelay(1);
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/* Deassert analog reset. */
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pm3386_reg_write(0, 0x002, 0x0062);
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if (secondary)
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pm3386_reg_write(1, 0x002, 0x0062);
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mdelay(10);
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/* Deassert digital reset. */
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pm3386_reg_write(0, 0x002, 0x0063);
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if (secondary)
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pm3386_reg_write(1, 0x002, 0x0063);
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mdelay(10);
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/* Restore programmed MAC addresses. */
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pm3386_set_mac(0, mac[0]);
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pm3386_set_mac(1, mac[1]);
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if (secondary)
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pm3386_set_mac(2, mac[2]);
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/* Disable carrier on all ports. */
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pm3386_set_carrier(0, 0);
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pm3386_set_carrier(1, 0);
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if (secondary)
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pm3386_set_carrier(2, 0);
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}
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static u16 swaph(u16 x)
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{
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return ((x << 8) | (x >> 8)) & 0xffff;
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}
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int pm3386_port_count(void)
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{
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return 2 + pm3386_secondary_present();
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}
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void pm3386_init_port(int port)
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{
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int pm = port >> 1;
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/*
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* Work around ENP2611 bootloader programming MAC address
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* in reverse.
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*/
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if (pm3386_port_reg_read(port, 0x30a, 0x100) == 0x0000 &&
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(pm3386_port_reg_read(port, 0x309, 0x100) & 0xff00) == 0x5000) {
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u16 temp[3];
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temp[0] = pm3386_port_reg_read(port, 0x308, 0x100);
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temp[1] = pm3386_port_reg_read(port, 0x309, 0x100);
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temp[2] = pm3386_port_reg_read(port, 0x30a, 0x100);
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pm3386_port_reg_write(port, 0x308, 0x100, swaph(temp[2]));
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pm3386_port_reg_write(port, 0x309, 0x100, swaph(temp[1]));
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pm3386_port_reg_write(port, 0x30a, 0x100, swaph(temp[0]));
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}
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/*
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* Initialise narrowbanding mode. See application note 2010486
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* for more information. (@@@ We also need to issue a reset
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* when ROOL or DOOL are detected.)
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*/
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pm3386_port_reg_write(port, 0x708, 0x10, 0xd055);
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udelay(500);
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pm3386_port_reg_write(port, 0x708, 0x10, 0x5055);
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/*
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* SPI-3 ingress block. Set 64 bytes SPI-3 burst size
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* towards SPI-3 bridge.
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*/
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pm3386_port_reg_write(port, 0x122, 0x20, 0x0002);
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/*
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* Enable ingress protocol checking, and soft reset the
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* SPI-3 ingress block.
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*/
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pm3386_reg_write(pm, 0x103, 0x0003);
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while (!(pm3386_reg_read(pm, 0x103) & 0x80))
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;
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/*
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* SPI-3 egress block. Gather 12288 bytes of the current
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* packet in the TX fifo before initiating transmit on the
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* SERDES interface. (Prevents TX underflows.)
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*/
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pm3386_port_reg_write(port, 0x221, 0x20, 0x0007);
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/*
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* Enforce odd parity from the SPI-3 bridge, and soft reset
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* the SPI-3 egress block.
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*/
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pm3386_reg_write(pm, 0x203, 0x000d & ~(4 << (port & 1)));
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while ((pm3386_reg_read(pm, 0x203) & 0x000c) != 0x000c)
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;
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/*
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* EGMAC block. Set this channels to reject long preambles,
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* not send or transmit PAUSE frames, enable preamble checking,
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* disable frame length checking, enable FCS appending, enable
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* TX frame padding.
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*/
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pm3386_port_reg_write(port, 0x302, 0x100, 0x0113);
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/*
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* Soft reset the EGMAC block.
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*/
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pm3386_port_reg_write(port, 0x301, 0x100, 0x8000);
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pm3386_port_reg_write(port, 0x301, 0x100, 0x0000);
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/*
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* Auto-sense autonegotiation status.
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*/
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pm3386_port_reg_write(port, 0x306, 0x100, 0x0100);
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/*
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* Allow reception of jumbo frames.
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*/
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pm3386_port_reg_write(port, 0x310, 0x100, 9018);
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/*
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* Allow transmission of jumbo frames.
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*/
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pm3386_port_reg_write(port, 0x336, 0x100, 9018);
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/* @@@ Should set 0x337/0x437 (RX forwarding threshold.) */
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/*
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* Set autonegotiation parameters to 'no PAUSE, full duplex.'
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*/
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pm3386_port_reg_write(port, 0x31c, 0x100, 0x0020);
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/*
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* Enable and restart autonegotiation.
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*/
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pm3386_port_reg_write(port, 0x318, 0x100, 0x0003);
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pm3386_port_reg_write(port, 0x318, 0x100, 0x0002);
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}
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void pm3386_get_mac(int port, u8 *mac)
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{
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u16 temp;
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temp = pm3386_port_reg_read(port, 0x308, 0x100);
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mac[0] = temp & 0xff;
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mac[1] = (temp >> 8) & 0xff;
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temp = pm3386_port_reg_read(port, 0x309, 0x100);
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mac[2] = temp & 0xff;
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mac[3] = (temp >> 8) & 0xff;
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temp = pm3386_port_reg_read(port, 0x30a, 0x100);
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mac[4] = temp & 0xff;
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mac[5] = (temp >> 8) & 0xff;
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}
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void pm3386_set_mac(int port, u8 *mac)
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{
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pm3386_port_reg_write(port, 0x308, 0x100, (mac[1] << 8) | mac[0]);
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pm3386_port_reg_write(port, 0x309, 0x100, (mac[3] << 8) | mac[2]);
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pm3386_port_reg_write(port, 0x30a, 0x100, (mac[5] << 8) | mac[4]);
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}
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static u32 pm3386_get_stat(int port, u16 base)
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{
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u32 value;
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value = pm3386_port_reg_read(port, base, 0x100);
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value |= pm3386_port_reg_read(port, base + 1, 0x100) << 16;
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return value;
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}
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void pm3386_get_stats(int port, struct net_device_stats *stats)
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{
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/*
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* Snapshot statistics counters.
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*/
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pm3386_port_reg_write(port, 0x500, 0x100, 0x0001);
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while (pm3386_port_reg_read(port, 0x500, 0x100) & 0x0001)
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;
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memset(stats, 0, sizeof(*stats));
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stats->rx_packets = pm3386_get_stat(port, 0x510);
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stats->tx_packets = pm3386_get_stat(port, 0x590);
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stats->rx_bytes = pm3386_get_stat(port, 0x514);
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stats->tx_bytes = pm3386_get_stat(port, 0x594);
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/* @@@ Add other stats. */
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}
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void pm3386_set_carrier(int port, int state)
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{
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pm3386_port_reg_write(port, 0x703, 0x10, state ? 0x1001 : 0x0000);
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}
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int pm3386_is_link_up(int port)
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{
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u16 temp;
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temp = pm3386_port_reg_read(port, 0x31a, 0x100);
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temp = pm3386_port_reg_read(port, 0x31a, 0x100);
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return !!(temp & 0x0002);
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}
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void pm3386_enable_rx(int port)
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{
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u16 temp;
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temp = pm3386_port_reg_read(port, 0x303, 0x100);
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temp |= 0x1000;
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pm3386_port_reg_write(port, 0x303, 0x100, temp);
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}
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void pm3386_disable_rx(int port)
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{
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u16 temp;
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temp = pm3386_port_reg_read(port, 0x303, 0x100);
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temp &= 0xefff;
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pm3386_port_reg_write(port, 0x303, 0x100, temp);
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}
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void pm3386_enable_tx(int port)
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{
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u16 temp;
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temp = pm3386_port_reg_read(port, 0x303, 0x100);
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temp |= 0x4000;
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pm3386_port_reg_write(port, 0x303, 0x100, temp);
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}
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void pm3386_disable_tx(int port)
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{
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u16 temp;
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temp = pm3386_port_reg_read(port, 0x303, 0x100);
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temp &= 0xbfff;
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pm3386_port_reg_write(port, 0x303, 0x100, temp);
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}
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MODULE_LICENSE("GPL");
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